Secure your Paris instructions against quarry risk
Instant pre-assessment of former underground quarries, Antediluvian gypsum and cavities for any address in Paris and the inner suburbs. Sharpen your valuations, protect your fees and convert more preliminary agreements into completed sales.
Why a Paris estate agent needs this tool
A sale that collapses between the preliminary agreement and completion means several weeks of work lost for your agency, and sometimes your fees gone with it. Yet one of the recurring causes of last-minute cancellation or renegotiation in Paris is the late discovery of a quarry risk — often just as the buyer submits their mortgage application and the bank calls for additional surveys.
A €5 pre-assessment consulted before the instruction is signed or shortly afterwards allows you to:
- Value the property more accurately (quarry exposure can justify a 5% to 15% discount).
- Inform prospective buyers proactively and avoid nasty surprises ahead of the preliminary agreement.
- Document your duty to advise as required by the Hoguet Act and article 1112-1 of the Civil Code.
- Reduce the withdrawal rate on your preliminary agreements.
🎯 More reliable valuations
Adjust the asking price before the listing goes live: a managed discount from the outset is better than a renegotiation forced on you at the notary’s table.
⚖️ Reinforced duty to advise
As a professional, the estate agent owes a reinforced duty to advise to both parties. A pre-assessment attached to the instruction and passed on to buyers is your best evidence of due diligence.
📈 Fewer collapsed sales
Anticipating the risk means the buyer does not discover it through their bank, their surveyor or their notary at the last minute — the point at which 70% of refusals occur.
Plans for estate agents & agencies
Discovery Pack
€4.90 / report — no commitment
- 10 pre-assessments to use whenever you like, with no expiry date
- PDF report ready to attach to the instruction
- Multi-address CSV import
- Business invoice including VAT
Agency Pack
€3.95 / report — ideal for teams
- 20 pre-assessments to use whenever you like, with no expiry date
- Collaborative access (up to 3 negotiators)
- CSV import up to 500 rows
- Priority email support
Unlimited subscription
Price guaranteed for life — first 100 agencies
- Unlimited reports in Paris + inner suburbs
- Unlimited users per agency
- Unlimited CSV import
- Priority support (reply in < 4 working hours)
- No commitment
What the law says for estate agents
Duty to advise (Hoguet Act no. 70-9 of 2 January 1970)
An estate agent holding a professional licence owes a reinforced duty to advise — settled case law since the 1990s. This duty covers all the decisive characteristics of the property, including geotechnical risks that are known or reasonably identifiable by a diligent professional.
Duty of disclosure (art. 1112-1 of the Civil Code)
“Where one party knows information that is of decisive importance for the other party’s consent, it must disclose it to them.” (source: Notaires de France)
Once an agent knows, or could reasonably know, of a quarry risk through their expertise in the Paris market and the public tools available to them, they run the risk of being held liable if they fail to disclose it.
Latent defect — not just the seller
The Cour de cassation recognises that the existence of underground quarries causing structural instability constitutes a latent defect (art. 1641 of the Civil Code). An agent may be held jointly liable where it is shown that they knew or should have known of the risk.
Mandatory risk statement (ERP, Act of 30 July 2003)
The risk and pollution statement (ERP) must be provided less than 6 months before the preliminary sale agreement. It is generated via errial.georisques.gouv.fr. That document does not, however, systematically cover historic Paris quarries that fall outside a risk prevention plan (PPR), hence the value of a complementary pre-assessment.
Practical use cases
Taking on an instruction
You are called in to view a property in the 14th or 13th arrondissement. Before you even set a price, a €5 pre-assessment tells you whether to adjust your valuation or step up your due diligence. Bonus: it impresses the seller with your professionalism.
Buying agent
A client instructs you to find a property. You run a pre-assessment on every shortlisted property as a matter of course: no nasty surprises at the technical inspection.
Buyer negotiation
A buyer is hesitating over a property you have on your books. Providing the pre-assessment (reassuring) speeds up the decision. Or, where there is a risk, it lets you factor it transparently into the price negotiation.
Portfolio audit
Import your 50 active instructions by CSV. Identify the ones at risk so you can prioritise compliance work and client communications.
Frequently asked questions
Does the pre-assessment expose me to liability if the report is incomplete?
No. Our report is explicitly presented as an informative pre-assessment, replacing neither the statutory ERP nor the official IGC consultation. On the contrary, it protects you by documenting your vigilance.
Can I pass it on to my clients?
Yes. The PDF can be given to your sellers and buyers, and attached to the instruction or the preliminary agreement. Some agents include it with every valuation as a differentiator.
Can it be charged to the client?
You are free to pass this service on to your clients as an ancillary cost, or to include it in your commission.
How long does a report take?
30 seconds on average to generate the PDF, available for immediate download from your dashboard.
Business invoicing?
Yes, an invoice with VAT (20%) in your agency’s name, tax-deductible and downloadable at any time.
Join the estate agents waiting list
Private demo version — leave us your details and we will get back to you when we open. No payment required.